RysiuM: Very good post and right to the point!! By the way, I like your new Avistar (photo). Take Care.....Captin

hi guys,
why to run a gas engine with a mix of glow and gas? only for the weight of ignition?
i am trying to run a glow engine with gas or gas-glow mix witch it will be cheaper.
any info how to do it?
i tryied to read the post but confused. i am not a pro, is there a simple way to do it?
thanks

so that would be 10% nitro and 10% oil in the glow fuel and then just add 2 parts gas correct?
i have some 7 year old nitro that WAS a 10/10 (10% nitro 10% oil) but it prolly has NO nitro by now but is it worth a try as we have plenty of it.

will it run with just a standard fuel mix? (less RPM of coarse) i.e, 50:1 gas and 2-stroke oil? or will this fuel the plug?

thanks for the first awnser guys! that should get me started

shaun

No!!! there are other benefits like for instance:

Fuel economy use half of what glow would, Zero radio signal interference, less weight, fuel would be less expensive, you can buy cheaper engines and convert them to gas/glow etc.

You will tell us

Mine run well with glow plug powered all the time. No problem with glow plug durability so far. Use the amount of oil recommended for the engine. Most of "garden" tools run on 1:33 so that's why 10/10 fuels is good. If your engine can run on 1:50, you can adjust the mixture as long as you have around 30% methanol (for running the engine without glow battery).

On the other subject, I have almost new OS BGX (35cc) laying around, that I will not use. I'm thinking of making a Walbro adapter and run it on gas/glow mixture (with 18% oil of course). What Walbro number should I use?

I would try something in the 12.5mm venturi range, maybe up to 13.5mm.

I bet if you never run it lean, you could go down to about 10% oil with that engine like the large Super Tigers recommend. Once the carb is set right, there is less chance of it going lean in flight with the pumper carb...

AV8TOR

Rysium. I'm running my magnum 1.8 (30 CC) with 8-10% oil and 4F plug on a small ventury walbro (I think it's a 9mm venturi) it runs beatifull although AV8TOR recommended that I would problably get more out of that engine if I used a bigger carb (11mm venturi), well I opened the back cover of the engine after running it and I see plenty of residual oil so I don't worry about my bushing seising out, the engine will still throw a smoke while running so that means that I do have enough lubrication and the plug doesn't get fouled up at all. So go for it buddy convert your O.S. BG, I thought that I was going to trash mine because of the expensive glow fuel, but now I don't have to worry of doing so thanks to our Gas/Glow conversion.

One more thing to add, If you have a low compression engine, by design, you will need more nitro.

Try this fuel to mix with gas, http://www2.towerhobbies.com/cgi-bin...8&I=LXHCT9&P=K

I have a ST-3250 that I would like to run on Gas-Glow.
It has a new ring so I'll need to run a gallon of fuel through it at 16%.

I guess the question I need answered are:
What oil should I mix in with?
How much if any nitro would you guess I should run?

If I start off with 5/18, how much oil will I have to add to a mix of
1 quart glow fuel and 2 quarts of gas?

Thanks Guys

Aeronut is running a Moki 1.8 which is a similar engine. I would suggest sending him a PM and ask for his "recipe" for fuel.

AV8TOR

I was looking for carbs at our e-bay guy (the link to his e-bay carbs was deleted by moderator, I guess). I found two 14-dollars carbs that might work:

WT-174. It is 12.7mm venturi with twin needle, not sure about the choke

WT-536. It is 13.49mm venturi with twin needle and looks like with this one has a choke.

So which one would be the best for OS-BGX-1 (35cc)?

For only $14.00 a piece I would buy both for experimentation. From my experience, I would say the 13.5mm would give the most power, at the possible expense of a perfect transition unless glow power is used.

AV8TOR

The link was deleted by a moderator---apparantly, some links you can post and others you can't. Ebay is one of them. If anyone wants the link, PM me and I'll send it to you.

Or just search ebay for Walbro numbers I posted - it's hard to miss this store. The guy is in the business since 2001 and no complains from customers (I just looked at over 5000 excellent feedbacks).

Av8tor1977

Don't you think this is pertinent information?
How to run a large Super Tigre on Gas-Glow.

It's a lot cheaper than converting it to needle bearing.
Plus more power and better idle too.

Sure, I think it's a great idea! It's just that Aeronut is already doing something similar, so I thought we should "pick his brain" for how he is doing it with that Moki 30cc.

I would do something similar to what you mentioned, but I would use a fuel with 10 percent nitro and 18% oil. One part of that to two parts of high test gas, then add enough oil to bring it up to about 10% total oil as Super Tiger recommends for their big bore engines. I would imagine a good two stroke oil such as "Pennzoil for Air Cooled Engines" would work fine, or Grade A castor oil. I haven't tried a mix like this personally, so I would recommend that if you use a two stroke oil, that you mix up some in a glass jar and let it sit for a while to check for separation.

Let's make it easy and say we are going to mix up a gallon of special Gas/Glow fuel for unmodified large Super Tiger engines.

In rounded off approximate numbers:

1/3 gallon = 42oz. of 10% nitro & 18% oil glow fuel. (This will theoretically have 7.6 ounces of oil in it.)
2/3 gallon = 84oz. of high test gasoline.
Add 5.2 ounces of oil and you will have approximately 10 percent overall oil in the mix.

It's late and I'm tired so somebody check my math on that but I think it's correct.

AV8TOR

What is wrong with e-bay links?

Klotz oil should mix real good with gas and glow fuel. Capt,n

Hi ralph sorry I didn't get back to you on the pm but I've been very busy lately (Home, wife work) but here is my suggestion;
I would try the 5/18 instead of the 10/18 due to the fact that big glow engines dont like nitro I noticed on mine that it gets hot at 3.3 % nitro so if you use 5% nitro you'll end up having about 1.66 % nitro, as far as the oil I would leave it at 6% i'm using somewhere between 8 and 10% and still have plenty of oil left over after running, it smokes and leaves a lot of residue to clean up but is up to you wheter to try 6% or go up to 10 if you decide to go up on oil just add 120 ml or 4 oz of of any good quality two stroke oil Amzoil or Mobil MX2T synthetic and youl be ok it will mix well, but again I would try 5/18 glow fuel for starters.

Boy that's tough.

As you know Super Tigre want's 10% glow fuel

Gasoline is a better lubricant than Alcohol so 6% might be okay.
That's twice the oil of gas engines.

I'd like to hear from others before I try it.
I have to make the Carb adapter before I can try it anyway.

Any idea what temperature your Moki is running? And what prop are your using?

I could monitor the exhaust temp, to be safe.

I had the adapter made to use a Walbro carb on my ST-3250.

The throat is the same size as the stock Super Tigre carb.
But is a lot smaller than a 32cc carb's throat.

Is this going to be an issue?

The throat is big enough to run the ST on glow fuel it should be big enough to run it on Gas-Glow.

Aero Nut what carb are you using on your Moki 1.8? I was thinking HDB 6B, I have a few of these.

What is the throat size of your adapter?

Hey guys, im really interested in this gas/glow stuff. I read to page 12 and gave up. Could one of you guys give a summary of what seems to be the best fuel mix for weedies on glow. I just came across 7 weedeater powerheads, 4 18cc 2 25cc and an unknown i think 21cc. The 2- 25cc are toast the cylinde3rs piston and ring have bad scoring should have checked before converting the crankcase. So im going to be converting the 21cc looks to be in good shape.

Maybe somebody wants to trade for a good 25cc piston and cylinder for a whole 18cc power head ?

The picture with 2 engines one is a 25cc and the other on the left is unknown can anybody identify it?

If i can do away with the flywheel, do i need anything besides the prop adapter for the taper on the crankshaft end as shown in one of the pics?

Ralphbf == You will see a good power gain if you go to a larger carb. The original Super Tiger carb is sized smaller to optimize fuel draw without a fuel pump. Since the Walbro has a built in pump, it can be considerably larger without problems, and will also provide more power. Of course this will only work if you can make your adapter throat bigger within the design constraints of the crankcase and your adapter, but I believe you can.

00airman == The mix that has given the best results, and that most everyone has settled on is:

1 part 10% oil - 10% nitro glow fuel
2 parts high test gasoline
Quality four stroke glow plug such as OS or Saito

AV8TOR

ok so just summing up on my behalf.
that combination (which i saved to my PC) will run WITHOUT constant power to the glow plug?

shaun

Let me say that the 10/10 mix works in a lot of engines well.

But if you remove power to the glow plug and the idle drops that can mean that you need more nitro
in the glow fuel. the 10/10 glow fuel seems to be good in higher compression engines

I have ran 15/18 fuel before with good results but like glow fuel it was messy.

There is no magic bullet, but it is pretty easy to hit target with Gas-Glow.